This free video science lesson from YouTube's bionerd23 demonstrates a simple technique for detecting the presence of radon, a radioactive noble gass. For all of the relevant details and detailed, step-by-step instructions, as well as to get started trying this experiment yourself, watch this home-science how-to.

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(1) Part 1 of 3 - How to Use an aquarium filter to detect the presence of radon, (2) Part 2 of 3 - How to Use an aquarium filter to detect the presence of radon, (3) Part 3 of 3 - How to Use an aquarium filter to detect the presence of radon